Academic Journal
Enhancing uranium extraction efficiency using protonated amines and quaternary ammoniums-based ionic liquids: mechanistic insights and nonlinearities analysis
| العنوان: | Enhancing uranium extraction efficiency using protonated amines and quaternary ammoniums-based ionic liquids: mechanistic insights and nonlinearities analysis |
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| المؤلفون: | Guerinoni, Elise, Dourdain, Sandrine, Dumas, Thomas, Arrachart, Guilhem, Giusti, Fabrice, Lu, Zijun, Solari, Pier-Lorenzo, Pellet-Rostaing, Stéphane |
| المساهمون: | Tri ionique par les Systèmes Moléculaires auto-assemblés (LTSM), Institut de Chimie Séparative de Marcoule (ICSM - UMR 5257), Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut des Sciences et technologies pour une Economie Circulaire des énergies bas carbone (ISEC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), Université de Montpellier (UM)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut des Sciences et technologies pour une Economie Circulaire des énergies bas carbone (ISEC), Université de Montpellier (UM), Département de recherche sur les procédés pour la mine et le recyclage du combustible (DMRC), Institut des Sciences et technologies pour une Economie Circulaire des énergies bas carbone (ISEC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), The NEEDS program, The CEA for their funding |
| المصدر: | ISSN: 2297-8739 ; Separations ; https://hal.science/hal-04224208 ; Separations, 2023, 10, pp.509. ⟨10.3390/separations10090509⟩ ; https://www.mdpi.com/2297-8739/10/9/509. |
| بيانات النشر: | CCSD MDPI |
| سنة النشر: | 2023 |
| المجموعة: | Université de Montpellier: HAL |
| مصطلحات موضوعية: | [CHIM]Chemical Sciences |
| الوصف: | International audience ; This study investigates uranium solvent extraction under AMEX process conditions. The use of pure extractants without diluents or phase modifiers allows us not only to reduce the use of volatile organic compounds but also to provide higher extraction yields without third-phase formation. Pure extractants are protonated amines or quaternary ammoniums with suitable counter ions, which act at the interface between ion pairs and protic ionic liquids. The mixture of sulphates anion (SO$_4$$^{2−}$) and bis(trifluoromethanesulfonyl)imide anion (NTf$^{2−}$) revealed unexpected nonlinear extraction behaviors, which appear highly important to rationalize for optimized application. A spectroscopic analysis (NMR, UV-vis, FT-IR, and EXAFS) showed that uranium extraction occurs via a protonated amine and three sulphates. A nonlinear extraction could further be interpreted by considering a water and acid transfer between the two phases: at lower sulphate ratios, the release of acid from the organic phase into the aqueous phase was shown to influence the number of protonated amines in the organic phase, affecting uranium extraction before its enhancement. Furthermore, the extraction loss at higher sulphate ratios was assigned to the destabilization of bidentate uranium–sulphate complexes due to a competition between water and sulphates. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.3390/separations10090509 |
| الاتاحة: | https://hal.science/hal-04224208 https://hal.science/hal-04224208v1/document https://hal.science/hal-04224208v1/file/separations-10-00509.pdf https://doi.org/10.3390/separations10090509 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.823E5B21 |
| قاعدة البيانات: | BASE |
| DOI: | 10.3390/separations10090509 |
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